Buffy the Vampire Slayer 2x7

Lie to Me

Ford, an old boyfriend of Buffy’s comes to Sunnydale and, unknown to her, is part of a secret sect which worships vampires. While the others in the sect are misguided teens who believe that vampires are a higher order of life, Ford has a more sinister reason for his deciet. Because he is going to die soon of cancer, he makes a deal with Spike to hand over Buffy in return for eternal life.